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1967-72 Tech Talk

1967 – 1972 Chevy and GMC Technical Article Listings

Monday, April 16th, 2018








Gas Tanks







Sheet Metal

Speedometer and Gauges

Speedometers to Go…




WD 40 Who Knew?

Friday, December 1st, 2017

WD-40 Who Knew?
What is the Main Ingredient of WD-40?
Before you read to the end, does anybody know what the main ingredient of WD-40? No Cheating WD-40 ~ Who knew!

I had a neighbor who bought a new pickup. I got up very early one Sunday morning and saw that someone had spray painted red all around the sides of this beige truck (for some unknown reason). I went over, woke him up, and told him the bad news. He was very upset and was trying to figure out what to do. .. probably nothing until Monday morning, since nothing was open. Another neighbor came out and told him to get his WD-40 and clean it off. It removed the unwanted paint beautifully and did not harm his paint job that was on the truck. I was impressed!

WD -40 who knew? “Water Displacement #40”. The product began from a search for a rust preventative solvent and de-greaser to protect missile parts. WD-40 was created in 1953, by three technicians at the San Diego Rocket Chemical Company. Its name comes from the project that was to find a ‘Water Displacement’ Compound. They were finally successful for a formulation, with their fortieth at-tempt, thus WD-40. The ‘Convair Company’ bought it in bulk to protect their atlas missile parts. Ken East (one of the original founders) says there is nothing in WD-40 that would hurt you.

When you read the ‘shower door’ part, try it. It’s the first thing that has ever cleaned that spotty shower door. If yours is plastic, it works just as well as on glass. It’s a miracle! Then try it on your stove-top. It’s now shinier than it’s ever been. You’ll be amazed.

WD-40 Uses:

1. Protects silver from tarnishing.
2. Removes road tar and grime from cars.
3. Cleans and lubricates guitar strings.
4. Gives floor that ‘just-waxed’ sheen without making them slippery.
5. Keeps the flies off of Cows, Horses, and other Farm Critters, as well. (Ya gotta love this one!!!)
6. Restores and cleans chalkboards.
7. Removes lipstick stains.
8. Loosens stubborn zippers.
9. Untangles jewelry chains.
10. Removes stains from stainless steel sinks.
11. Removes dirt and grime from the barbecue grill.
12. Keeps ceramic/terracotta garden pots from oxidizing.
13. Removes tomato stains from clothing.
14. Keeps glass shower doors free of water spots.
15. Camouflages scratches on ceramic and marble floors.
16. Keeps scissors working smoothly.
17. Lubricates noisy door hinges on both home and vehicles doors.
18. It removes that nasty tar and scuff marks from the kitchen flooring. It doesn’t seem to harm the finish and you won’t have to scrub nearly as hard to get them off.
Just remember to open some windows, for ventilation, if you have a lot of marks.
19. Remove those nasty bug guts that will eat away the finish on your car if not removed quickly!
20. Gives a children’s playground gym slide a shine for a super fast slide.
21. Lubricates gearshift and mower deck lever for ease of handling on riding mowers.
22. Rids kids rocking chair and swings free of squeaky noises.
23. Lubricates tracks in sticking home windows and makes them easier to open.
24. Spraying an umbrella stem makes it easier to open and close.
25. Restores and cleans padded leather dashboards in vehicles, as well as vinyl bumpers.
26. Restores and cleans roof racks on vehicles.
27. Lubricates and stops squeaks in electric fans.
28. Lubricates wheel sprockets on tricycles, wagons, and bicycles for easy handling.
29. Lubricates fan belts on washers and dryers and keeps them running smoothly.
30. Keeps rust from forming on saws and saw blades, and other tools.
31. Removes grease splatters from stove-tops.
32. Keeps bathroom mirror from fogging.
33. Lubricates prosthetic limbs.
34. Keeps pigeons off the balcony (they hate the smell).
35. Removes all traces of duct tape.
36. Folks even spray it on their arms, hands, and knees to relieve arthritis pain.
37. Florida’s favorite use is: ‘cleans and removes love bugs from grills and bumpers.’
38. The favorite use in the state of New York, it protects the Statue of Liberty from the elements.
39. WD-40 attracts fish. Spray a little on live bait or lures and you will be catching the big one in no time. Also, it’s a lot cheaper than the chemical attractants
that are made for just that purpose. Keep in mind though, using some chemical laced baits or lures for fishing are not allowed in some states.
40. Use it for fire ant bites. It takes the sting away immediately and stops the itch.
41. It is great for removing crayon from walls. Spray it on the marks and wipe with a clean rag.
42. Also, if you’ve discovered that your teenage daughter has washed and dried a tube of lipstick with a load of laundry, saturate the lipstick spots with WD-40 and re-wash.
Presto! The lipstick is gone!
43. If you spray it inside a wet distributor cap, it will displace the moisture, allowing the engine to start.

P.S. As for that Basic, Main Ingredient

Well…. it’s FISH OIL!!!

1960-72 Gas Tank Danger, Is There a Problem?

Friday, October 6th, 2017

There appears to be a rumor being spread that the 1960-72 behind the seat gas tank (in a carburetor engine) should be relocated. The major reasons said is “gas fumes or safety”. Here is the other side of the argument.

General Motors was not stupid! Do some people today really think GM would have sold millions of unsafe trucks in those years? Even then, there was a large supply of lawsuits if accidents occurred due to a deliberate sale of improperly engineer trucks.

The most negative comment heard from some gas tank relocating companies is “a gasoline smell might develop in the cab at any time”. Almost impossible!

Beginning in 1960 the gas tank and the fill spout were welded together as one unit. The very slight possibility of any gas fumes would be from under the sending unit gasket in the middle top of the tank. There is no place to store merchandise there. Then this gasket or seal is never disturbed and its five machine screws in the attaching plate are not moved.

The gas spout (part of the tank assembly) has the filler hole outside the cab. A tight gas grommet in the opening where the spout exits the cab prevents gasoline or rain water from ever entering the inside.

It goes even further. There is no fuel exiting the bottom of the tank. Gasoline leaves the top of the tank by being pulled by the fuel pump on the engine.
Here is a comment of safety in a vehicle collision in a front or rear hit or the truck gets a major side on its cab. What is the chance gasoline will leak unless the tank is ruptured. Very unlikely!

Compare this with someone placing the gas tank behind the rear axle below the bed versus it being mounted in the cab as General Motors did it.
Remember the 1973 Ford Pinto car parked on the roadside in 1978 that was rammed from behind at about 30 miles per hour? The gas tank was behind the rear axle. It burst into flames and Pinto occupants were all burned to death.

Reports range from 27 to 180 deaths as a result of rear impact related fuel tank fires in the Pinto. For additional data: Check Google and type in “Ford Pinto Gas Tank Explosion”.

Frame Cutting – Be Careful!

Friday, November 18th, 2016

General Motors realized that after larger work trucks left the factory some owners would want to lengthen or shorten the side frame rails. Replacement beds would sometime require a different wheel base.

Therefore, as a warning GM painted or etched letters to tell owners the importance of a good, safe connection after the frame is cut. The attached photo shows a 1936 Chevrolet still showing this lettering on the inner frame rail. It is understood a similar warning is also on more modern trucks. Note: Even in the mid-1930’s the attorneys of General Motors were suggesting these warnings be visible to lessen laws suits!


1936 1 ½ ton from a farm in Western Kansas. Still displays the warning after 80 years! Seen just after the cut. Sorry photo does not help seeing the letters!

Gas Tank Baffles

Wednesday, November 16th, 2016

For the many people that have not seen a gas tank baffle, this should be of interest. These are usually flat metal dividers welded inside a fuel tank. They slow the side to side movement of the fuel. Numerous openings between the welded dividers cause a slower movement of fuel. See Photo.

Baffle Trivia!

1. All tanks in a vehicle that moves must have baffles so a sudden sharp turn or stop does not cause all the liquid contents to instantly surge to one side of the tank.

2. The surge of fuel can even uncover the low filled fuel tank’s pickup inlet so the engine hesitates or stops.

3. Noise of fuel moving from side to side can create an annoying sound if near the passenger area.

4. On early vehicles the fuel can be forced out of the fill inlet to drip on exterior paint or running boards.

5. Example of a non-baffle moving tank with liquid inside: Ever been behind a yard spraying truck moving in a neighborhood? The liquid fertilizer or insecticide freely moves from side to side
as the translucent plastic storage tank is moved on the side streets.

1937 Chevy truck tank cut in half showing one baffle

1967 A New Design

Friday, March 18th, 2016

The 1967 Chevrolet is sometimes referred to as the first that really attracted the buyer that did not need a truck just for work. It was a one of the first GM trucks that related to the country’s growing interest in pickups as a daily driver or a substitute as a first or second family vehicle.

The cab and bed were completely redesigned with an up to date look. The mechanicals were much like the prior 1966 year but the older sheet metal design and interior used the past seven years were history.

What an attention getter when the 1967 made its first appearance in the dealer’s showroom!

It was great for the work truck buyers but when loaded with options, it appealed to many buyers that wanted the extras of a car.

A deluxe package made the pickup even more eye catching. Chevrolet referred to this top of the line as the CST. (Custom Sport Truck) Exterior extras were decorative side moldings, chrome bumpers, and hub caps, large rear window plus windshield with polished stainless steel trim.

FACT: The bright trim on the CST tailgate was the first time a Chevrolet had made it available on a pickup. The CST emblem is always on each door just below the window bottom.
If the buyer wanted even more extras they could order factory air conditioning, power brakes, power steering, automatic transmission, AM radio, (No AM-FM until 1968) tinted glass, full wheel covers, white wall tires, overload rear springs, bumper guards, etc.

The standard engine was the almost bullet proof inline 250 cubic inch six cylinder. Yes, in 1967 the six cylinder still remained the top seller above the 283ci and 327ci V-8 engine but dropped slightly below to second position the next year.


The CST interior was the real extra for the new owner. Color coordinated padded door panels, with arm rests, and vinyl seats were a plus. Even two bucket seats were part of the CST package and were made with additional padding for the traveler. In place of a console, offered a few years later, the space between the seats was filled by what some called a “buddy seat”. Its small lower cushion could be raised to expose a storage compartment. Its back cushion could be lowered to give a wide arm rest for passenger and driver.


The 1967-72 Chevy pickup has always been a more expensive truck on the used resale market, however it is the 1967 that has just recently been discovered by many collectors. The 1971-1972 has kept ahead in value and the 1967 was so often forgotten. Therefore, few have been kept as restoration projects. Particularly the lower production 1967 CST. The value as a fully restored 1967 CST pickup is now quickly increasing.

NOTE: A person at the January 2015 large Barrett Jackson Auto Auction in Phoenix, AZ was selling a ground up restored 1971 Chevy pickup with the front sheet metal from a 1967 ½ ton. (An exact fit) He said “I always restore my 1969-72 Chevy pickups for this auction in this manner. They bring more money!”



CST emblem always on door below window

The CST buckets plus buddy seat

Buddy seat displayed alone

All the bright work they had!

Out of the 1967 Chevy Truck Sales Brochure.

1967 Small window. Last year for pickups

Large window. Used on CST,

GM’s first tailgate trim (also on side of taillight)



1967 Chevrolet Truck Trivia
Last Year
For the fameous 283 CI V-8. Changed to 305in 1968
For “not” having side body marker lights
For “no” FM radio setting, even as a dealer option
For power steering using a “slave cylinder”. Not powered through steering gear boxes like 1968

For the small rear window on pickups except CST. Two ton trucks used small rear window
through 1972

First Year
For trim on tailgate
For top of the line CST (Custom Sport Truck)
For accessory full wheel covers since 1954
For one hand opening tailgate
For padded dash
For metal bed floor (Wood planks became an option)

Engine Vacuum Leaks

Thursday, June 4th, 2015

Even the smallest vacuum leak on an internal combustion engine can prevent it operating to the level of its capability.

No matter how well you rebuild the carburetor, adjust the timing, or clean the gas tank, the engine will continue to operate below what it should even with a small vacuum leak.

On older engines a quick, easy way to check for leaks near the cast iron manifold will often uncover the problem.

    1. Place a large piece of cardboard behind the radiator cooling fan. See photo. This stops fan air flow in the area of the meeting point of the manifold, carburetor and engine head.1
    2. Use a spray can of starting fluid (available at auto parts stores). Let engine idle, and lightly spray in areas of where air flow will let into the carburetor through.2
    3. If you have even a small vacuum leak the starting fluid will be pulled incorrectly into the engine combustion chamber. The engine RPM will instantly increase. Your engine problem has been found! A new gasket or insulator plate will usually make all well.3

Blazer Top Facts

Monday, September 15th, 2014

At a recent truck show a 1972 GMC Blazer was so original that several special points should be shown on the vehicle’s unaltered fiber glass top.

Two dome lights are on the left interior side. This allows light for passengers on the front and rear seat. These are the same as in the pickup and big trucks above their rear window.

As this fiber glass top is made to be removed, GM installed 2 plug and warning plate. This was to remind the owner that when removing the top you must pull the plug. This connected the main wiring harness to the wires in the top that lead to the two dome lights.

A clothes hanger hook is behind the front dome light

These fiberglass tops have survived very well over the years. Of course, they are not made for a person’s weight but when used correctly they will last many years beyond their current 42 years!

Top in Place

Both Dome Lights

Front Dome Light

Rear Dome Light

Clothes Hanger Behind Front Door

Warning Plate for Plug

More Distance View of Warning Plate

Blazer Spare Tire Mount

Friday, September 12th, 2014

A rarely seen view of the Blazer spare tire mount. When you preferred to keep you spare inside for security or just to lower the cost over an outside swing bracket, GM provided this special two foot mount behind the rear seat. It is secured by fasteners to the metal Blazer floor.


1969-72 Chevrolet Standard/Deluxe Grills

Friday, September 12th, 2014

During these years there were no difference between grill in the base lower price model (Custom) and the top of the line Super Cheyenne.
The reason is simple! High volume reduces high prices! Most Chevrolet trucks in these years used an anodized aluminum grill housing with a plastic insert. In proportion to the mid series and top of the line Chevy Cheyenne, General Motors could not produce a custom grill at a lower price.
Therefore, when you purchased a custom truck in these years the difference in the front was receiving a non-plated white bumper.



Ground Hogs and Dirt Floors

Monday, August 18th, 2014

We assume the increase population of these little 12 to 15 pound rodents in the past 20 years is due to stricter in-city zoning that does not allow dogs outside without some type of restraint.
Beware! Ground hogs (woodchuck) are on the hunt for a dry place out of the rain to call home. They love a dry dirt floor barn or related storage building. These rodents continually dig their tunnels throughout which is protection from possibly any predators. They have keen eye sight, even can see you 200 feet away, and run for a tunnel!
Look at this 1959 Chevrolet Napco 4×4 stored out of sight about 5 years. Ground hogs placed one of their tunnels under the front wheels. The trucks weight soon dropped it into a tunnel and the straight front axle is on in the dirt!






But it’s my home!

1971 Disc Brake Decal

Tuesday, August 5th, 2014

It’s 1971 and what we all knew was coming it arrived with this new model year. For the first time Chevrolet and GMC light trucks were equipped with front disc brakes (several years after certain models of Chevy cars).
To show the world this new addition was available, a special decal was on the left side of the tail gates. This was not added the following year.


Radio Blank-Out

Friday, October 11th, 2013

So unusual in today’s world!  When you did not order a radio in your new 1967-72 GM truck, here is what you received.

A simple metal plate that pressed into the two holes that usually secured the tuner knobs.  Certainly a very rare item, as later owners have found at least a used radio to place in the dash.

Economical Gas Tank Cleaning

Friday, July 19th, 2013

We recently had a local radiator repair shop clean the rust from an older used gas tank.  They submerged it in a cleaning acid tank overnight.  The price was $65.00.  WOW!   Several months later we discovered an “old school” method that would have cost about $1.00.  Oh well, we live and learn.

Back in the days of the Great Depression money was a scarce commodity and economical methods in life were used or otherwise things probably did not get done.  It was discovered that agricultural molasses (not what you buy in the grocery store) mixed with four parts water removed rust.  Fill your tank with this combination and wait about a week.  Surprise!  Your gas tank is shiny clean inside.

You can even put a lid on a five gallon bucket from a hardware store and small parts covered with this formula will have all the rust removed in less than a week.

Agricultural molasses is used to mix with livestock feed.  It causes farm animals to eat otherwise less desirable feeds because of its attractive sweet taste.

Retail price at a livestock feed store is about $2.00 for 10 pounds.

This data is provided by MIKE RUSSELL of COLUMBIA, MISSOURI.

Another cleaning Technique!

Several years ago, we heard of a gas tank cleaning method that cleans most tanks every time and its FREE!

Attach the gas tank to a farm tractor large rear wheel before a day in the field.  Add about a pint of ¼” gravel.  The slow rotation of the large wheel will move the gravel continually inside the old tank.  Sometimes even by noon, the rust is all removed as the gravel continually moves inside the tanks. Just pour out all contents and the tank is cleaned!

Technical Articles

Friday, March 18th, 2011

Over the many years we have collected a wealth of knowledge working with Chevrolet and GMC trucks from the years 1934 – 1972. We have gathered our Tech Articles, write-ups and how to’s and divided them into categories. You will find a list of helpful Articles that will help you get your old truck looking and running like new again.

1934, 1946 Chevy, GMC Trucks 1947, 1955 Chevy & GMC Trucks 1955, 1966 Chevy & GMC Trucks 1967, 1972 Chevy & GMC Trucks

Jim Carter Truck Parts….

Your #1 Source for 1934 – 1972 Chevy & GMC Truck Parts!

1969-1972 Head Light Bezel

Thursday, February 11th, 2010

Contrary to what almost all Chevrolet truck parts dealers list in their catalogs, the 1969-1972 headlight bezels were not alike. Though today all are reproduced in bright-anodized aluminum. This is actually only correct for 1971-1972.

The 1969-1970 bezels were black stamped steel even on the most deluxe models. This color is necessary to blend with the two horizontal black lines in the center grill bar.

If you don’t have the correct stamped steel bezels for your 1969-1970 Chevrolet, paint the 1971-1972 aluminum copies in satin black to match the grill stripes.

1969 headlight bezel 1

1969-1970 on Left | 1971-1972 on Right (above)

1969 headlight bezel 2 1969 headlight bezel 3